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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] blktap2: add blktap2 device class anddevicecontroller
Hi Ryan,
I thought...
Are blktap1 and blktap2 used as follows?
And the head of the string of disk parameters for blktap devices is
'tap:' only, isn't it?
Is my understanding right?
| blktap2 |
+-----------+-----------+
| Installed | Not |
| | Installed |
-----+-----------+-----------+
aio |blktap2 |blktap1 |
-----+-----------+-----------+
sync |blktap1 |blktap1 |
-----+-----------+-----------+
vmdk |blktap1 |blktap1 |
-----+-----------+-----------+
ram |blktap2 |blktap1 |
-----+-----------+-----------+
qcow |blktap2 |blktap1 |
-----+-----------+-----------+
qcow2|blktap1 |blktap1 |
-----+-----------+-----------+
vhd |blktap2 |blktap1 |
-----+-----------+-----------+
ioemu|blktap1 |blktap1 |
-----+-----------+-----------+
Best regards,
Kan
Wed, 01 Jul 2009 13:33:35 +0900, Masaki Kanno wrote:
>Hi Ryan,
>
>>blktap2 devices must be handled differently than blktap2 devices. blktap2
> ^^^^^^^
> blktap1? typo?
>
>
>Basically questions:
>
>How should I define a disk parameter into VM configuration files to use
>blktap1 devices?
>
> e.g. disk = [ 'tap:aio:root-vm1.img,xvda,w' ]
>
>
>How should I define a disk parameter into VM configuration files to use
>blktap2 devices?
>
> e.g. disk = [ 'tap2:aio:root-vm2.img,xvda,w' ]
>
>
>If you distinguish the device class of blktap2 devices from the device
>class of blktap1 devices, should you modify it as follows?
>I think that the device class of blktap1 devices should be 'tap' if we
>use blktap1 devices as before.
>
>diff -r 7397608bce87 -r 6295171d4ccc tools/python/xen/xm/create.py
>--- a/tools/python/xen/xm/create.py Mon Jun 29 15:50:32 2009 +0100
>+++ b/tools/python/xen/xm/create.py Tue Jun 30 17:44:41 2009 -0700
>@@ -718,7 +718,7 @@ def configure_disks(config_devs, vals):
> """
> for (uname, dev, mode, backend, protocol) in vals.disk:
> if uname.startswith('tap:'):
> cls = 'tap'
>+ elif uname.startswith('tap2:'):
>+ cls = 'tap2'
> else:
> cls = 'vbd'
>
>
>Best regards,
> Kan
>
>Tue, 30 Jun 2009 17:49:44 -0700, "Ryan O'Connor" wrote:
>
>># HG changeset patch
>># User Ryan O'Connor <rjo@xxxxxxxxx>
>># Date 1246409081 25200
>># Node ID 6295171d4ccc60f80f0411217d9b1c7d8543c804
>># Parent 7397608bce877b151ee507413a8e228092947ee4
>>blktap2: add blktap2 device class and device controller
>>
>>blktap2 devices must be handled differently than blktap2 devices. blktap2
>>devices require a sysfs write to close the underlying device, as well as
>>extra
>>sysfs writes when the domU is paused/unpaused. The differences between
>>blktap1
>>and blktap2 are great enough to warrant the creation of a new device class,
>>'tap2', and device controller for blktap2 devices.
>>
>> * add a new device controller (Blktap2Controller) and device class (tap2)
>> for
>> blktap2 devices
>> * move blktap2 specific code from DevController to Blktap2Controller
>> * if possible, check xenstore to determine block device class
>> * use vmpath (/vm/<uuid>/) when releasing devices
>> * modify linux hotplug cleanup script to handle blktap2 device removal
>>
>>Signed-off-by: Ryan O'Connor <rjo@xxxxxxxxx>
>>
>>diff -r 7397608bce87 -r 6295171d4ccc tools/hotplug/Linux/xen-hotplug-cleanup
>>--- a/tools/hotplug/Linux/xen-hotplug-cleanup Mon Jun 29 15:50:32 2009 +0100
>>+++ b/tools/hotplug/Linux/xen-hotplug-cleanup Tue Jun 30 17:44:41 2009 -0700
>>@@ -18,6 +18,13 @@ vm=$(xenstore_read_default "/local/domai
>> # construct /vm/UUID/device/DEVCLASS/DEVID
>> if [ "$vm" != "" ]; then
>> vm_dev="$vm/device/${path_array[1]}/${path_array[3]}"
>>+
>>+ # if the vm path does not exist and the device class is 'vbd' then we
>>may have
>>+ # a tap2 device
>>+ if [ ! $(xenstore-read "vm_dev" 2>/dev/null) ] \
>>+ && [ "${path_array[1]}" = "vbd" ]; then
>>+ vm_dev="$vm/device/tap2/${path_array[3]}"
>>+ fi
>> else
>> vm_dev=
>> fi
>>diff -r 7397608bce87 -r 6295171d4ccc tools/python/xen/xend/XendConfig.py
>>--- a/tools/python/xen/xend/XendConfig.py Mon Jun 29 15:50:32 2009 +0100
>>+++ b/tools/python/xen/xend/XendConfig.py Tue Jun 30 17:44:41 2009 -0700
>>@@ -1114,7 +1114,7 @@ class XendConfig(dict):
>> controller = domain.getDeviceController(cls)
>> configs = controller.configurations(txn)
>> for config in configs:
>>- if sxp.name(config) in ('vbd', 'tap'):
>>+ if sxp.name(config) in ('vbd', 'tap',
>>'tap2'):
>> dev_uuid = sxp.child_value(config,
>>'uuid')
>> dev_type, dev_cfg = self['devices'][
>>dev_uuid]
>> if sxp.child_value(config, 'bootable',
>> None) is None:
>>@@ -1179,7 +1179,7 @@ class XendConfig(dict):
>> def device_duplicate_check(self, dev_type, dev_info, defined_config,
>>config):
>> defined_devices_sxpr = self.all_devices_sxpr(target =
>>defined_config)
>>
>>- if dev_type == 'vbd' or dev_type == 'tap':
>>+ if dev_type == 'vbd' or dev_type == 'tap' or dev_type == 'tap2':
>> dev_uname = dev_info.get('uname')
>> blkdev_name = dev_info.get('dev')
>> devid = self._blkdev_name_to_number(blkdev_name)
>>@@ -1187,7 +1187,7 @@ class XendConfig(dict):
>> return
>>
>> for o_dev_type, o_dev_info in defined_devices_sxpr:
>>- if o_dev_type == 'vbd' or o_dev_type == 'tap':
>>+ if o_dev_type == 'vbd' or o_dev_type == 'tap' or
>>o_dev_type == 'tap2':
>> blkdev_file = blkdev_uname_to_file(dev_uname)
>> o_dev_uname = sxp.child_value(o_dev_info, 'uname')
>> if o_dev_uname != None:
>>@@ -1369,7 +1369,7 @@ class XendConfig(dict):
>> else:
>> dev_info['driver'] = 'paravirtualised'
>>
>>- if dev_type == 'tap':
>>+ if dev_type == 'tap' or dev_type == 'tap2':
>> if dev_info['uname'].split(':')[1] not in
>> blktap_disk_types:
>> raise XendConfigError("tap:%s not a valid disk type" %
>> dev_info['uname'].split(':')[1])
>>@@ -1406,7 +1406,7 @@ class XendConfig(dict):
>> # Compat hack -- mark first disk bootable
>> dev_info['bootable'] = int(not target[param])
>> target[param].append(dev_uuid)
>>- elif dev_type == 'tap':
>>+ elif dev_type == 'tap' or dev_type == 'tap2':
>> if 'vbd_refs' not in target:
>> target['vbd_refs'] = []
>> if dev_uuid not in target['vbd_refs']:
>>@@ -1504,7 +1504,7 @@ class XendConfig(dict):
>> target['devices'][dev_uuid] = (dev_type, dev_info)
>> target['vif_refs'].append(dev_uuid)
>>
>>- elif dev_type in ('vbd', 'tap'):
>>+ elif dev_type in ('vbd', 'tap', 'tap2'):
>> dev_info['type'] = cfg_xenapi.get('type', 'Disk')
>> if dev_info['type'] == 'CD':
>> old_vbd_type = 'cdrom'
>>diff -r 7397608bce87 -r 6295171d4ccc tools/python/xen/xend/XendDevices.py
>>--- a/tools/python/xen/xend/XendDevices.py Mon Jun 29 15:50:32 2009 +0100
>>+++ b/tools/python/xen/xend/XendDevices.py Tue Jun 30 17:44:41 2009 -0700
>>@@ -20,7 +20,7 @@
>> #
>>
>> from xen.xend.server import blkif, netif, tpmif, pciif, iopif, irqif,
>>vfbif, vscsiif
>>-from xen.xend.server.BlktapController import BlktapController
>>+from xen.xend.server.BlktapController import BlktapController,
>>Blktap2Controller
>> from xen.xend.server.ConsoleController import ConsoleController
>>
>>
>>@@ -42,6 +42,7 @@ class XendDevices:
>> 'ioports': iopif.IOPortsController,
>> 'irq': irqif.IRQController,
>> 'tap': BlktapController,
>>+ 'tap2': Blktap2Controller,
>> 'vfb': vfbif.VfbifController,
>> 'vkbd': vfbif.VkbdifController,
>> 'console': ConsoleController,
>>diff -r 7397608bce87 -r 6295171d4ccc tools/python/xen/xend/XendDomainInfo.py
>>--- a/tools/python/xen/xend/XendDomainInfo.py Mon Jun 29 15:50:32 2009 +0100
>>+++ b/tools/python/xen/xend/XendDomainInfo.py Tue Jun 30 17:44:41 2009 -0700
>>@@ -538,12 +538,11 @@ class XendDomainInfo:
>> @raise XendError: Failed pausing a domain
>> """
>> try:
>>- bepath="/local/domain/0/backend/"
>> if(self.domid):
>>-
>>- dev = xstransact.List(bepath + 'vbd' + "/%d" % (self.
>>domid,))
>>+ # get all blktap2 devices
>>+ dev = xstransact.List(self.vmpath + 'device/tap2')
>> for x in dev:
>>- path = self.getDeviceController('vbd').readBackend(x,
>>'params')
>>+ path = self.getDeviceController('tap2').readBackend(x,
>> 'params')
>> if path and path.startswith('/dev/xen/blktap-2'):
>> #Figure out the sysfs path.
>> pattern = re.compile('/dev/xen/blktap-2/tapdev(\d+
>>)$')
>>@@ -569,11 +568,10 @@ class XendDomainInfo:
>> @raise XendError: Failed unpausing a domain
>> """
>> try:
>>- bepath="/local/domain/0/backend/"
>> if(self.domid):
>>- dev = xstransact.List(bepath + "vbd" + "/%d" % (self.
>>domid,))
>>+ dev = xstransact.List(self.vmpath + 'device/tap2')
>> for x in dev:
>>- path = self.getDeviceController('vbd').readBackend(x,
>>'params')
>>+ path = self.getDeviceController('tap2').readBackend(x,
>> 'params')
>> if path and path.startswith('/dev/xen/blktap-2'):
>> #Figure out the sysfs path.
>> pattern = re.compile('/dev/xen/blktap-2/tapdev(\d+
>>)$')
>>@@ -812,6 +810,11 @@ class XendDomainInfo:
>> try:
>> dev_config_dict['devid'] = devid = \
>> self._createDevice(dev_type, dev_config_dict)
>>+ if dev_type == 'tap2':
>>+ # createDevice may create a blktap1 device if blktap2
>>is not
>>+ # installed or if the blktap driver is not supported in
>>+ # blktap1
>>+ dev_type = self.getBlockDeviceClass(devid)
>> self._waitForDevice(dev_type, devid)
>> except VmError, ex:
>> del self.info['devices'][dev_uuid]
>>@@ -821,7 +824,7 @@ class XendDomainInfo:
>> elif dev_type == 'vscsi':
>> for dev in dev_config_dict['devs']:
>> XendAPIStore.deregister(dev['uuid'], 'DSCSI')
>>- elif dev_type == 'tap':
>>+ elif dev_type == 'tap' or dev_type == 'tap2':
>> self.info['vbd_refs'].remove(dev_uuid)
>> else:
>> self.info['%s_refs' % dev_type].remove(dev_uuid)
>>@@ -1200,9 +1203,10 @@ class XendDomainInfo:
>> if self.domid is not None:
>>
>> #new blktap implementation may need a sysfs write after
>>everything is torn down.
>>- dev = self.getDeviceController(deviceClass).
>>convertToDeviceNumber(devid)
>>- path = self.getDeviceController(deviceClass).readBackend(dev,
>>'params')
>>- if path and path.startswith('/dev/xen/blktap-2'):
>>+
>>+ if deviceClass == 'tap2':
>>+ dev = self.getDeviceController(deviceClass).
>>convertToDeviceNumber(devid)
>>+ path = self.getDeviceController(deviceClass).readBackend(
>>dev, 'params')
>> frontpath = self.getDeviceController(deviceClass).
>>frontendPath(dev)
>> backpath = xstransact.Read(frontpath, "backend")
>> thread.start_new_thread(self.getDeviceController(
>>deviceClass).finishDeviceCleanup, (backpath, path))
>>@@ -1238,7 +1242,7 @@ class XendDomainInfo:
>> dev_info = self._getDeviceInfo_vif(mac)
>> else:
>> _, dev_info = sxprs[dev]
>>- else: # 'vbd' or 'tap'
>>+ else: # 'vbd' or 'tap' or 'tap2'
>> dev_info = self._getDeviceInfo_vbd(dev)
>> # To remove the UUID of the device from refs,
>> # deviceClass must be always 'vbd'.
>>@@ -1267,7 +1271,7 @@ class XendDomainInfo:
>> sxprs = []
>> dev_num = 0
>> for dev_type, dev_info in self.info.all_devices_sxpr():
>>- if (deviceClass == 'vbd' and dev_type not in ['vbd', 'tap'
>>]) or \
>>+ if (deviceClass == 'vbd' and dev_type not in ['vbd', 'tap'
>>, 'tap2']) or \
>> (deviceClass != 'vbd' and dev_type != deviceClass):
>> continue
>>
>>@@ -1295,12 +1299,27 @@ class XendDomainInfo:
>> return sxprs
>>
>> def getBlockDeviceClass(self, devid):
>>- # To get a device number from the devid,
>>- # we temporarily use the device controller of VBD.
>>- dev = self.getDeviceController('vbd').convertToDeviceNumber(devid)
>>- dev_info = self._getDeviceInfo_vbd(dev)
>>- if dev_info:
>>- return dev_info[0]
>>+ # if the domain is running we can get the device class from
>>xenstore.
>>+ # This is more accurate, as blktap1 devices show up as blktap2
>>devices
>>+ # in the config.
>>+ if self._stateGet() in (DOM_STATE_RUNNING, DOM_STATE_PAUSED,
>>DOM_STATE_CRASHED):
>>+ # All block devices have a vbd frontend, so we know the
>>frontend path
>>+ dev = self.getDeviceController('vbd').convertToDeviceNumber(
>>devid)
>>+ frontendPath = "%s/device/vbd/%s" % (self.dompath, dev)
>>+ for devclass in XendDevices.valid_devices():
>>+ for dev in xstransact.List("%s/device/%s" % (self.vmpath,
>>devclass)):
>>+ devFrontendPath = xstransact.Read("%s/device/%s/%s/
>>frontend" % (self.vmpath, devclass, dev))
>>+ if frontendPath == devFrontendPath:
>>+ return devclass
>>+
>>+ else: # the domain is not active so we must get the device class
>>+ # from the config
>>+ # To get a device number from the devid,
>>+ # we temporarily use the device controller of VBD.
>>+ dev = self.getDeviceController('vbd').convertToDeviceNumber(
>>devid)
>>+ dev_info = self._getDeviceInfo_vbd(dev)
>>+ if dev_info:
>>+ return dev_info[0]
>>
>> def _getDeviceInfo_vif(self, mac):
>> for dev_type, dev_info in self.info.all_devices_sxpr():
>>@@ -1311,7 +1330,7 @@ class XendDomainInfo:
>>
>> def _getDeviceInfo_vbd(self, devid):
>> for dev_type, dev_info in self.info.all_devices_sxpr():
>>- if dev_type != 'vbd' and dev_type != 'tap':
>>+ if dev_type != 'vbd' and dev_type != 'tap' and dev_type !=
>>'tap2':
>> continue
>> dev = sxp.child_value(dev_info, 'dev')
>> dev = dev.split(':')[0]
>>@@ -2256,26 +2275,19 @@ class XendDomainInfo:
>> log.debug("No device model")
>>
>> log.debug("Releasing devices")
>>- t = xstransact("%s/device" % self.dompath)
>>+ t = xstransact("%s/device" % self.vmpath)
>> try:
>> for devclass in XendDevices.valid_devices():
>> for dev in t.list(devclass):
>> try:
>>- true_devclass = devclass
>>- if devclass == 'vbd':
>>- # In the case of "vbd", the true device class
>>- # may possibly be "tap". Just in case, verify
>>- # device class.
>>- devid = dev.split('/')[-1]
>>- true_devclass = self.getBlockDeviceClass(devid)
>> log.debug("Removing %s", dev);
>>- self.destroyDevice(true_devclass, dev, False);
>>+ self.destroyDevice(devclass, dev, False);
>> except:
>> # Log and swallow any exceptions in removal --
>> # there's nothing more we can do.
>> log.exception("Device release failed: %s; %s; %s",
>> self.info['name_label'],
>>- true_devclass, dev)
>>+ devclass, dev)
>> finally:
>> t.abort()
>>
>>@@ -2948,7 +2960,7 @@ class XendDomainInfo:
>>
>> fn = blkdev_uname_to_file(disk)
>> taptype = blkdev_uname_to_taptype(disk)
>>- mounted = devtype == 'tap' and taptype != 'aio' and taptype !=
>> 'sync' and not os.stat(fn).st_rdev
>>+ mounted = devtype in ['tap', 'tap2'] and taptype != 'aio' and
>>taptype != 'sync' and not os.stat(fn).st_rdev
>> if mounted:
>> # This is a file, not a device. pygrub can cope with a
>> # file if it's raw, but if it's QCOW or other such formats
>>@@ -3052,7 +3064,8 @@ class XendDomainInfo:
>> diff = time.time() - start
>> vbds = self.getDeviceController('vbd').deviceIDs()
>> taps = self.getDeviceController('tap').deviceIDs()
>>- for i in vbds + taps:
>>+ tap2s = self.getDeviceController('tap2').deviceIDs()
>>+ for i in vbds + taps + tap2s:
>> test = 1
>> log.info("Dev %s still active, looping...", i)
>> time.sleep(0.1)
>>@@ -3635,7 +3648,7 @@ class XendDomainInfo:
>> """
>> xenapi_vbd['image'] = vdi_image_path
>> if vdi_image_path.startswith('tap'):
>>- dev_uuid = self.info.device_add('tap', cfg_xenapi = xenapi_vbd)
>>+ dev_uuid = self.info.device_add('tap2', cfg_xenapi =
>>xenapi_vbd)
>> else:
>> dev_uuid = self.info.device_add('vbd', cfg_xenapi = xenapi_vbd)
>>
>>@@ -3647,7 +3660,7 @@ class XendDomainInfo:
>> _, config = self.info['devices'][dev_uuid]
>>
>> if vdi_image_path.startswith('tap'):
>>- dev_control = self.getDeviceController('tap')
>>+ dev_control = self.getDeviceController('tap2')
>> else:
>> dev_control = self.getDeviceController('vbd')
>>
>>diff -r 7397608bce87 -r 6295171d4ccc tools/python/xen/xend/server/
>>BlktapController.py
>>--- a/tools/python/xen/xend/server/BlktapController.py Mon Jun 29 15:
50:32
>>2009 +0100
>>+++ b/tools/python/xen/xend/server/BlktapController.py Tue Jun 30 17:
44:41
>>2009 -0700
>>@@ -24,7 +24,7 @@ blktap_disk_types = [
>> 'ioemu',
>> 'tapdisk',
>> ]
>>-
>>+
>> def doexec(args, inputtext=None):
>> """Execute a subprocess, then return its return code, stdout and
>>stderr"""
>> proc = popen2.Popen3(args, True)
>>@@ -49,8 +49,7 @@ def parseDeviceString(device):
>>
>> return minor, device, control
>>
>>-
>>-
>>+# blktap1 device controller
>> class BlktapController(BlkifController):
>> def __init__(self, vm):
>> BlkifController.__init__(self, vm)
>>@@ -59,11 +58,6 @@ class BlktapController(BlkifController):
>> """@see DevController#frontendRoot"""
>>
>> return "%s/device/vbd" % self.vm.getDomainPath()
>>-
>>- def devicePath(self, devid):
>>- """@see DevController#devicePath"""
>>-
>>- return "%s/device/vbd/%s" % (self.vm.vmpath, devid)
>>
>> def getDeviceDetails(self, config):
>> (devid, back, front) = BlkifController.getDeviceDetails(self,
>>config)
>>@@ -123,6 +117,20 @@ class BlktapController(BlkifController):
>>
>> return (devid, back, front)
>>
>>+class Blktap2Controller(BlktapController):
>>+ def __init__(self, vm):
>>+ BlktapController.__init__(self, vm)
>>+
>>+ def backendPath(self, backdom, devid):
>>+ if self.deviceClass == 'tap2':
>>+ deviceClass = 'vbd'
>>+ else:
>>+ deviceClass = 'tap'
>>+ return "%s/backend/%s/%s/%d" % (backdom.getDomainPath(),
>>+ deviceClass,
>>+ self.vm.getDomid(), devid)
>>+
>>+
>> def createDevice(self, config):
>>
>> uname = config.get('required_uname', '')
>>@@ -140,12 +148,16 @@ class BlktapController(BlkifController):
>> stderr.close();
>> if( out.find("blktap2") >= 0 ):
>> blktap2_installed=1;
>>-
>>+
>> if typ in ('tap'):
>>- if subtyp in ('tapdisk'):
>>
>>+ if subtyp in ('tapdisk'):
>> if params in ('ioemu', 'qcow2', 'vmdk', 'sync') or not
>>blktap2_installed:
>>- log.warn('WARNING: using deprecated blktap module');
>>- return BlkifController.createDevice(self, config);
>>+ # pass this device off to BlktapController
>>+ log.warn('WARNING: using deprecated blktap module')
>>+ self.deviceClass = 'tap'
>>+ devid = BlktapController.createDevice(self, config)
>>+ self.deviceClass = 'tap2'
>>+ return devid
>>
>> cmd = [ TAPDISK_BINARY, '-n', '%s:%s' % (params, file) ]
>> (rc,stdout,stderr) = doexec(cmd)
>>@@ -165,7 +177,32 @@ class BlktapController(BlkifController):
>> #device is configured. Then continue to create the device
>> config.update({'uname' : 'phy:' + device.rstrip()})
>>
>>- self.deviceClass='vbd'
>> devid = BlkifController.createDevice(self, config)
>>- self.deviceClass='tap'
>> return devid
>>+
>>+ # The new blocktap implementation requires a sysfs signal to close
>>+ # out disks. This function is called from a thread when the
>>+ # domain is detached from the disk.
>>+ def finishDeviceCleanup(self, backpath, path):
>>+ """Perform any device specific cleanup
>>+
>>+ @backpath backend xenstore path.
>>+ @path frontend device path
>>+
>>+ """
>>+
>>+ #Figure out what we're going to wait on.
>>+ self.waitForBackend_destroy(backpath)
>>+
>>+ #Figure out the sysfs path.
>>+ pattern = re.compile('/dev/xen/blktap-2/tapdev(\d+)$')
>>+ ctrlid = pattern.search(path)
>>+ ctrl = '/sys/class/blktap2/blktap' + ctrlid.group(1)
>>+
>>+ #Close out the disk
>>+ f = open(ctrl + '/remove', 'w')
>>+ f.write('remove');
>>+ f.close()
>>+
>>+ return
>>+
>>diff -r 7397608bce87 -r 6295171d4ccc tools/python/xen/xend/server/
>>DevController.py
>>--- a/tools/python/xen/xend/server/DevController.py Mon Jun 29 15:50:32
>>2009 +0100
>>+++ b/tools/python/xen/xend/server/DevController.py Tue Jun 30 17:44:41
>>2009 -0700
>>@@ -238,34 +238,6 @@ class DevController:
>> # xstransact.Remove(self.devicePath()) ?? Below is the same ?
>> self.vm._removeVm("device/%s/%d" % (self.deviceClass, dev))
>>
>>- # The new blocktap implementation requires a sysfs signal to close
>>- # out disks. This function is called from a thread when the
>>- # domain is detached from the disk.
>>- def finishDeviceCleanup(self, backpath, path):
>>- """Perform any device specific cleanup
>>-
>>- @backpath backend xenstore path.
>>- @path frontend device path
>>-
>>- """
>>-
>>- if path and path.startswith('/dev/xen/blktap-2'):
>>-
>>- #Figure out what we're going to wait on.
>>- self.waitForBackend_destroy(backpath)
>>-
>>- #Figure out the sysfs path.
>>- pattern = re.compile('/dev/xen/blktap-2/tapdev(\d+)$')
>>- ctrlid = pattern.search(path)
>>- ctrl = '/sys/class/blktap2/blktap' + ctrlid.group(1)
>>-
>>- #Close out the disk
>>- f = open(ctrl + '/remove', 'w')
>>- f.write('remove');
>>- f.close()
>>-
>>- return
>>-
>> def configurations(self, transaction = None):
>> return map(lambda x: self.configuration(x, transaction), self.
>>deviceIDs(transaction))
>>
>>@@ -575,7 +547,6 @@ class DevController:
>>
>> backpath = self.readVm(devid, "backend")
>>
>>-
>> if backpath:
>> statusPath = backpath + '/' + HOTPLUG_STATUS_NODE
>> ev = Event()
>>diff -r 7397608bce87 -r 6295171d4ccc tools/python/xen/xm/create.py
>>--- a/tools/python/xen/xm/create.py Mon Jun 29 15:50:32 2009 +0100
>>+++ b/tools/python/xen/xm/create.py Tue Jun 30 17:44:41 2009 -0700
>>@@ -718,7 +718,7 @@ def configure_disks(config_devs, vals):
>> """
>> for (uname, dev, mode, backend, protocol) in vals.disk:
>> if uname.startswith('tap:'):
>>- cls = 'tap'
>>+ cls = 'tap2'
>> else:
>> cls = 'vbd'
>>
>>diff -r 7397608bce87 -r 6295171d4ccc tools/python/xen/xm/main.py
>>--- a/tools/python/xen/xm/main.py Mon Jun 29 15:50:32 2009 +0100
>>+++ b/tools/python/xen/xm/main.py Tue Jun 30 17:44:41 2009 -0700
>>@@ -2371,7 +2371,7 @@ def parse_block_configuration(args):
>> dom = args[0]
>>
>> if args[1].startswith('tap:'):
>>- cls = 'tap'
>>+ cls = 'tap2'
>> else:
>> cls = 'vbd'
>>
>>@@ -2706,7 +2706,9 @@ def xm_block_detach(args):
>> dom = args[0]
>> dev = args[1]
>> dc = server.xend.domain.getBlockDeviceClass(dom, dev)
>>- if dc == "tap":
>>+ if dc == "tap2":
>>+ detach(args, 'tap2')
>>+ elif dc == "tap":
>> detach(args, 'tap')
>> else:
>> detach(args, 'vbd')
>>
>>_______________________________________________
>>Xen-devel mailing list
>>Xen-devel@xxxxxxxxxxxxxxxxxxx
>>http://lists.xensource.com/xen-devel
>
>
>_______________________________________________
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>Xen-devel@xxxxxxxxxxxxxxxxxxx
>http://lists.xensource.com/xen-devel
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